I haven't suggested in a hot minute either, but for starters I'd check the current market using backpack.tf classified first just to make sure the price you're suggesting makes sense. If there are many unsuccessful sellers below your price or many buyers above your price, it's very likely inaccurate. If there are sales spanning a range of prices, use a range from the lowest sale to the highest (set min/max price). When doing this also consider that some sales might be outliers. For example, your sale at 17 keys is almost 3 times your lowest sale at 6 keys. Also sales need to be recent; like I mentioned all your sales are over 3 months old, which is the cutoff for unusual sales, much less non-unusual items. There have probably been a lot more sales from the past few weeks, though I can't really tell you where to find them easily since I'm not sure either, but you can probably find out by looking at recent accepted suggestions.